> What can "own" possibly mean in this context?
This sounds unnecessarily reductive. By "own" I would mean that I can re-read the book again and again and again as many times as I want as long as I take good care of the book and prevent it from disintegrating.
But the DRM e-books can't be used like that. That was their point.
After moving my personal library this month, I think I want to copy all my paper books to microfiche. I would absolutely buy first run books on fiche.